CN104902404A - Loudspeaker and sound cavity shell thereof - Google Patents
Loudspeaker and sound cavity shell thereof Download PDFInfo
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- CN104902404A CN104902404A CN201510148466.0A CN201510148466A CN104902404A CN 104902404 A CN104902404 A CN 104902404A CN 201510148466 A CN201510148466 A CN 201510148466A CN 104902404 A CN104902404 A CN 104902404A
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Abstract
The invention discloses a loudspeaker and a sound cavity shell thereof, and belongs to the technical field of loudspeakers. The sound cavity shell comprises a first sound channel, a second sound channel and a third sound channel, wherein the two ends of the second sound channel are communicated with the first sound channel and the third sound channel respectively, thereby forming a channel of a U-shaped structure; a first sound outlet is formed in the end part opening of the first sound channel; and a second sound outlet is formed in the end part opening of the third sound channel. The loudspeaker comprises the sound cavity shell and a sound film, wherein the sound film is arranged in the first sound channel. Through adoption of the loudspeaker and the sound cavity shell thereof, the output sound pressure levels of loudspeakers with the same power are raised, and a frequency response curve is closer to a monomer output curve.
Description
Technical field
The present invention relates to loud speaker field, particularly relate to a kind of loud speaker and operatic tunes housing thereof.
Background technology
Loud speaker is a requisite structure in mobile terminal.The sound film of the loud speaker of intelligent terminal, when vibrating, being all front and back double vibrationses back and forth, sounding by driving air.In prior art, the back cavity design of loud speaker, it is all the space that one section of airtight or band leak is directly set at sound film rear, this structure is not considered when sound film is to the workmanship driving air during after vibration, therefore the power of this part becomes thermal losses in vain, further, this situation also can affect choacoustic frequency response curve, and the curve recorded when curve when being contained in cavity and loudspeaker monomer is declined to some extent.
Summary of the invention
Main purpose of the present invention is to propose a kind of loud speaker and operatic tunes housing thereof, the power loss band be intended to when solving the vibration of prior art sound film of loudspeaker affects choacoustic frequency response curve, makes the problem that the curve recorded when curve when being contained in cavity and loudspeaker monomer declines to some extent.
For achieving the above object, the operatic tunes housing of a kind of loud speaker provided by the invention, described operatic tunes housing comprises:
First sound channel, the second sound channel and the 3rd sound channel, described second sound channel two ends are communicated with the first sound channel and the 3rd sound channel respectively, form the passage of " U " type structure;
Open-ended formation first sound mouth of described first sound channel;
Open-ended formation second sound mouth of the 3rd sound channel.
A kind of loud speaker operatic tunes housing as above is provided,
The corner that described second sound channel is connected with described first sound channel is provided with sound reflecting barrier;
Described sound reflecting barrier is provided with reflecting surface, and when sound wave is along the first sound channels spread to described corner, reflection will be carried out to described sound in described sound reflecting face makes described sound wave propagate along second channel.
There is provided a kind of loud speaker operatic tunes housing as above, the corner that described second sound channel is connected with described 3rd sound channel is provided with sound reflecting barrier;
Described sound reflecting barrier is provided with reflecting surface, and when sound wave is along the first sound channels spread to described corner, described reflecting surface will carry out reflection to described sound wave makes described sound wave propagate along third channel.
There is provided a kind of loud speaker operatic tunes housing as above, the angle of the inwall of the reflecting surface of described sound reflecting barrier and the first sound channel, the second sound channel or the 3rd sound channel is 45 °.
There is provided a kind of loud speaker operatic tunes housing as above, described sound reflecting barrier is made up of sound reflection material.
A kind of as above loud speaker operatic tunes housing is provided, described sound reflection material comprise in following material any one: glass fibre, alloy material or silicon crystal.
There is provided a kind of loud speaker operatic tunes housing as above, described first sound channel is used for coordinating with the sound film of described loud speaker.
There is provided a kind of loud speaker operatic tunes housing as above, the cross section of described operatic tunes housing is " U " type structure corresponding with the passage of described " U " type structure.
In addition, for achieving the above object, the present invention also proposes a kind of loud speaker, comprise sound film, described loud speaker also comprises operatic tunes housing described above, described sound film is arranged in described first sound channel, the sound channel of " U " structure in described operatic tunes housing is divided into ante-chamber and back cavity, wherein said first sound channel forms ante-chamber from described sound film to the part of the first sound mouth, and described first sound channel forms back cavity from the part after described sound film and the second sound channel be connected with described first sound channel, the 3rd sound channel.
The loud speaker that the present invention proposes and operatic tunes housing thereof, the passage being communicated with " U " type structure forming title by first passage, second channel and third channel is successively provided with in operatic tunes housing, and the sound wave of loud speaker is arranged in the first sound channel of this operatic tunes housing and the passage being somebody's turn to do " U " type structure is divided into ante-chamber and back cavity, therefore sound film forms primary sound to the sound wave produced during after vibration by ante-chamber, and spread out of from the first sound mouth, sound film forms echo to the sound wave produced during after vibration by this back cavity, and spreads out of from the second sound mouth and strengthen primary sound.Therefore, it is possible to make the output sound pressure level of the loud speaker of same power higher, frequency response curve is closer to monomer curve of output.
Accompanying drawing explanation
Fig. 1 is the hardware configuration schematic diagram of the mobile terminal realizing each embodiment of the present invention;
Fig. 2 is the wireless communication system schematic diagram of mobile terminal as shown in Figure 1;
The structural representation of a kind of loud speaker that Fig. 3 provides for the embodiment of the present invention and operatic tunes housing thereof.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The mobile terminal realizing each embodiment of the present invention is described referring now to accompanying drawing.In follow-up description, use the suffix of such as " module ", " parts " or " unit " for representing element only in order to be conducive to explanation of the present invention, itself is specific meaning not.Therefore, " module " and " parts " can mixedly use.
Mobile terminal can be implemented in a variety of manners.Such as, the terminal described in the present invention can comprise the such as mobile terminal of mobile phone, smart phone, notebook computer, digit broadcasting receiver, PDA (personal digital assistant), PAD (panel computer), PMP (portable media player), guider etc. and the fixed terminal of such as digital TV, desktop computer etc.Below, suppose that terminal is mobile terminal.But it will be appreciated by those skilled in the art that except the element except being used in particular for mobile object, structure according to the embodiment of the present invention also can be applied to the terminal of fixed type.
Fig. 1 is the hardware configuration signal of the mobile terminal realizing each embodiment of the present invention.
Mobile terminal 100 can comprise wireless communication unit 110, A/V (audio/video) input unit 120, user input unit 130, sensing cell 140, output unit 150, memory 160, interface unit 170, controller 180 and power subsystem 190 etc.Fig. 1 shows the mobile terminal with various assembly, it should be understood that, does not require to implement all assemblies illustrated.Can alternatively implement more or less assembly.Will be discussed in more detail below the element of mobile terminal.
Wireless communication unit 110 generally includes one or more assembly, and it allows the radio communication between mobile terminal 100 and wireless communication system or network.Such as, wireless communication unit can comprise at least one in broadcast reception module 111, mobile communication module 112, wireless Internet module 113, short range communication module 114 and positional information module 115.
Broadcast reception module 111 via broadcast channel from external broadcasting management server receiving broadcast signal and/or broadcast related information.Broadcast channel can comprise satellite channel and/or terrestrial channel.Broadcast management server can be generate and send the server of broadcast singal and/or broadcast related information or the broadcast singal generated before receiving and/or broadcast related information and send it to the server of terminal.Broadcast singal can comprise TV broadcast singal, radio signals, data broadcasting signal etc.And broadcast singal may further include the broadcast singal combined with TV or radio signals.Broadcast related information also can provide via mobile communications network, and in this case, broadcast related information can be received by mobile communication module 112.Broadcast singal can exist in a variety of manners, such as, it can exist with the form of the electronic service guidebooks (ESG) of the electronic program guides of DMB (DMB) (EPG), digital video broadcast-handheld (DVB-H) etc.Broadcast reception module 111 can by using the broadcast of various types of broadcast system Received signal strength.Especially, broadcast reception module 111 can by using such as multimedia broadcasting-ground (DMB-T), DMB-satellite (DMB-S), digital video broadcasting-hand-held (DVB-H), forward link media (MediaFLO
) the digit broadcasting system receiving digital broadcast of Radio Data System, received terrestrial digital broadcasting integrated service (ISDB-T) etc.Broadcast reception module 111 can be constructed to be applicable to providing the various broadcast system of broadcast singal and above-mentioned digit broadcasting system.The broadcast singal received via broadcast reception module 111 and/or broadcast related information can be stored in memory 160 (or storage medium of other type).
Radio signal is sent at least one in base station (such as, access point, Node B etc.), exterior terminal and server and/or receives radio signals from it by mobile communication module 112.Various types of data that such radio signal can comprise voice call signal, video calling signal or send according to text and/or Multimedia Message and/or receive.
Wireless Internet module 113 supports the Wi-Fi (Wireless Internet Access) of mobile terminal.This module can be inner or be externally couple to terminal.Wi-Fi (Wireless Internet Access) technology involved by this module can comprise WLAN (WLAN) (Wi-Fi), Wibro (WiMAX), Wimax (worldwide interoperability for microwave access), HSDPA (high-speed downlink packet access) etc.
Short range communication module 114 is the modules for supporting junction service.Some examples of short-range communication technology comprise bluetooth
tM, radio-frequency (RF) identification (RFID), Infrared Data Association (IrDA), ultra broadband (UWB), purple honeybee
tMetc..
Positional information module 115 is the modules of positional information for checking or obtain mobile terminal.The typical case of positional information module is GPS (global positioning system).According to current technology, GPS module 115 calculates from the range information of three or more satellite and correct time information and for the Information application triangulation calculated, thus calculates three-dimensional current location information according to longitude, latitude and pin-point accuracy.Current, the method for calculating location and temporal information uses three satellites and by the error of the position that uses an other satellite correction calculation to go out and temporal information.In addition, GPS module 115 can carry out computational speed information by Continuous plus current location information in real time.
A/V input unit 120 is for audio reception or vision signal.A/V input unit 120 can comprise camera 121 and microphone 1220, and the view data of camera 121 to the static images obtained by image capture apparatus in Video Capture pattern or image capture mode or video processes.Picture frame after process may be displayed on display unit 151.Picture frame after camera 121 processes can be stored in memory 160 (or other storage medium) or via wireless communication unit 110 and send, and can provide two or more cameras 1210 according to the structure of mobile terminal.Such acoustic processing can via microphones sound (voice data) in telephone calling model, logging mode, speech recognition mode etc. operational mode, and can be voice data by microphone 122.Audio frequency (voice) data after process can be converted to the formatted output that can be sent to mobile communication base station via mobile communication module 112 when telephone calling model.Microphone 122 can be implemented various types of noise and eliminate (or suppress) algorithm and receiving and sending to eliminate (or suppression) noise or interference that produce in the process of audio signal.
User input unit 130 can generate key input data to control the various operations of mobile terminal according to the order of user's input.User input unit 130 allows user to input various types of information, and keyboard, the young sheet of pot, touch pad (such as, detecting the touch-sensitive assembly of the change of the resistance, pressure, electric capacity etc. that cause owing to being touched), roller, rocking bar etc. can be comprised.Especially, when touch pad is superimposed upon on display unit 151 as a layer, touch-screen can be formed.
Sensing cell 140 detects the current state of mobile terminal 100, (such as, mobile terminal 100 open or close state), the position of mobile terminal 100, user for mobile terminal 100 contact (namely, touch input) presence or absence, the orientation of mobile terminal 100, the acceleration or deceleration of mobile terminal 100 move and direction etc., and generate order or the signal of the operation for controlling mobile terminal 100.Such as, when mobile terminal 100 is embodied as sliding-type mobile phone, sensing cell 140 can sense this sliding-type phone and open or close.In addition, whether whether sensing cell 140 can detect power subsystem 190 provides electric power or interface unit 170 to couple with external device (ED).Sensing cell 140 can comprise proximity transducer 1410 and will be described this in conjunction with touch-screen below.
Interface unit 170 is used as at least one external device (ED) and is connected the interface that can pass through with mobile terminal 100.Such as, external device (ED) can comprise wired or wireless head-band earphone port, external power source (or battery charger) port, wired or wireless FPDP, memory card port, for connecting the port, audio frequency I/O (I/O) port, video i/o port, ear port etc. of the device with identification module.Identification module can be that storage uses the various information of mobile terminal 100 for authentication of users and can comprise subscriber identification module (UIM), client identification module (SIM), Universal Subscriber identification module (USIM) etc.In addition, the device (hereinafter referred to " recognition device ") with identification module can take the form of smart card, and therefore, recognition device can be connected with mobile terminal 100 via port or other jockey.Interface unit 170 may be used for receive from external device (ED) input (such as, data message, electric power etc.) and the input received be transferred to the one or more element in mobile terminal 100 or may be used for transmitting data between mobile terminal and external device (ED).
In addition, when mobile terminal 100 is connected with external base, interface unit 170 can be used as to allow by it electric power to be provided to the path of mobile terminal 100 from base or can be used as the path that allows to be transferred to mobile terminal by it from the various command signals of base input.The various command signal inputted from base or electric power can be used as and identify whether mobile terminal is arranged on the signal base exactly.Output unit 150 is constructed to provide output signal (such as, audio signal, vision signal, alarm signal, vibration signal etc.) with vision, audio frequency and/or tactile manner.Output unit 150 can comprise display unit 151, dio Output Modules 152, alarm unit 153 etc.
Display unit 151 may be displayed on the information of process in mobile terminal 100.Such as, when mobile terminal 100 is in telephone calling model, display unit 151 can show with call or other communicate (such as, text messaging, multimedia file are downloaded etc.) be correlated with user interface (UI) or graphic user interface (GUI).When mobile terminal 100 is in video calling pattern or image capture mode, display unit 151 can the image of display capture and/or the image of reception, UI or GUI that video or image and correlation function are shown etc.
Meanwhile, when display unit 151 and touch pad as a layer superposed on one another to form touch-screen time, display unit 151 can be used as input unit and output device.Display unit 151 can comprise at least one in liquid crystal display (LCD), thin-film transistor LCD (TFT-LCD), Organic Light Emitting Diode (OLED) display, flexible display, three-dimensional (3D) display etc.Some in these displays can be constructed to transparence and watch from outside to allow user, and this can be called transparent display, and typical transparent display can be such as TOLED (transparent organic light emitting diode) display etc.According to the specific execution mode wanted, mobile terminal 100 can comprise two or more display units (or other display unit), such as, mobile terminal can comprise outernal display unit (not shown) and inner display unit (not shown).Touch-screen can be used for detecting touch input pressure and touch input position and touch and inputs area.
When dio Output Modules 152 can be under the isotypes such as call signal receiving mode, call mode, logging mode, speech recognition mode, broadcast reception mode at mobile terminal, voice data convert audio signals that is that wireless communication unit 110 is received or that store in memory 160 and exporting as sound.And dio Output Modules 152 can provide the audio frequency relevant to the specific function that mobile terminal 100 performs to export (such as, call signal receives sound, message sink sound etc.).Dio Output Modules 152 can comprise loud speaker, buzzer etc.
Alarm unit 153 can provide and export that event informed to mobile terminal 100.Typical event can comprise calling reception, message sink, key signals input, touch input etc.Except audio or video exports, alarm unit 153 can provide in a different manner and export with the generation of notification event.Such as, alarm unit 153 can provide output with the form of vibration, when receive calling, message or some other enter communication (incomingcommunication) time, alarm unit 153 can provide sense of touch to export (that is, vibrating) to notify to user.By providing such sense of touch to export, even if when the mobile phone of user is in the pocket of user, user also can identify the generation of various event.Alarm unit 153 also can provide the output of the generation of notification event via display unit 151 or dio Output Modules 152.
Memory 160 software program that can store process and the control operation performed by controller 180 etc., or temporarily can store oneself through exporting the data (such as, telephone directory, message, still image, video etc.) that maybe will export.And, memory 160 can store about when touch be applied to touch-screen time the vibration of various modes that exports and the data of audio signal.
Memory 160 can comprise the storage medium of at least one type, described storage medium comprises flash memory, hard disk, multimedia card, card-type memory (such as, SD or DX memory etc.), random access storage device (RAM), static random-access memory (SRAM), read-only memory (ROM), Electrically Erasable Read Only Memory (EEPROM), programmable read only memory (PROM), magnetic storage, disk, CD etc.And mobile terminal 100 can be connected the memory function of execute store 160 network storage device with by network cooperates.
Controller 180 controls the overall operation of mobile terminal usually.Such as, controller 180 performs the control relevant to voice call, data communication, video calling etc. and process.In addition, controller 180 can comprise the multi-media module 1810 for reproducing (or playback) multi-medium data, and multi-media module 1810 can be configured in controller 180, or can be configured to be separated with controller 180.Controller 180 can pattern recognition process, is identified as character or image so that input is drawn in the handwriting input performed on the touchscreen or picture.
Power subsystem 190 receives external power or internal power and provides each element of operation and the suitable electric power needed for assembly under the control of controller 180.
Various execution mode described herein can to use such as computer software, the computer-readable medium of hardware or its any combination implements.For hardware implementation, execution mode described herein can by using application-specific IC (ASIC), digital signal processor (DSP), digital signal processing device (DSPD), programmable logic device (PLD), field programmable gate array (FPGA), processor, controller, microcontroller, microprocessor, being designed at least one performed in the electronic unit of function described herein and implementing, in some cases, such execution mode can be implemented in controller 180.For implement software, the execution mode of such as process or function can be implemented with allowing the independent software module performing at least one function or operation.Software code can be implemented by the software application (or program) write with any suitable programming language, and software code can be stored in memory 160 and to be performed by controller 180.
So far, oneself is through the mobile terminal according to its functional description.Below, for the sake of brevity, by the slide type mobile terminal that describes in various types of mobile terminals of such as folded form, board-type, oscillating-type, slide type mobile terminal etc. exemplarily.Therefore, the present invention can be applied to the mobile terminal of any type, and is not limited to slide type mobile terminal.
Mobile terminal 100 as shown in Figure 1 can be constructed to utilize and send the such as wired and wireless communication system of data via frame or grouping and satellite-based communication system operates.
Describe wherein according to the communication system that mobile terminal of the present invention can operate referring now to Fig. 2.
Such communication system can use different air interfaces and/or physical layer.Such as, the air interface used by communication system comprises such as frequency division multiple access (FDMA), time division multiple access (TDMA), code division multiple access (CDMA) and universal mobile telecommunications system (UMTS) (especially, Long Term Evolution (LTE)), global system for mobile communications (GSM) etc.As non-limiting example, description below relates to cdma communication system, but such instruction is equally applicable to the system of other type.
With reference to figure 2, cdma wireless communication system can comprise multiple mobile terminal 100, multiple base station (BS) 270, base station controller (BSC) 275 and mobile switching centre (MSC) 280.MSC280 is constructed to form interface with Public Switched Telephony Network (PSTN) 290.MSC280 is also constructed to form interface with the BSC275 that can be couple to base station 270 via back haul link.Back haul link can construct according to any one in some interfaces that oneself knows, described interface comprises such as E1/T1, ATM, IP, PPP, frame relay, HDSL, ADSL or xDSL.Will be appreciated that system as shown in Figure 2 can comprise multiple BSC2750.
Each BS270 can serve one or more subregion (or region), by multidirectional antenna or point to specific direction each subregion of antenna cover radially away from BS270.Or each subregion can by two or more antenna covers for diversity reception.Each BS270 can be constructed to support multiple parallel compensate, and each parallel compensate has specific frequency spectrum (such as, 1.25MHz, 5MHz etc.).
Subregion can be called as CDMA Channel with intersecting of parallel compensate.BS270 also can be called as base station transceiver subsystem (BTS) or other equivalent terms.Under these circumstances, term " base station " may be used for broadly representing single BSC275 and at least one BS270.Base station also can be called as " cellular station ".Or each subregion of particular B S270 can be called as multiple cellular station.
As shown in Figure 2, broadcast singal is sent to the mobile terminal 100 at operate within systems by broadcsting transmitter (BT) 295.Broadcast reception module 111 as shown in Figure 1 is arranged on mobile terminal 100 and sentences the broadcast singal receiving and sent by BT295.In fig. 2, several global positioning system (GPS) satellite 300 is shown.Satellite 300 helps at least one in the multiple mobile terminal 100 in location.
In fig. 2, depict multiple satellite 300, but understand, the satellite of any number can be utilized to obtain useful locating information.GPS module 115 as shown in Figure 1 is constructed to coordinate to obtain the locating information wanted with satellite 300 usually.Substitute GPS tracking technique or outside GPS tracking technique, can use can other technology of position of tracking mobile terminal.In addition, at least one gps satellite 300 optionally or extraly can process satellite dmb transmission.
As a typical operation of wireless communication system, BS270 receives the reverse link signal from various mobile terminal 100.Mobile terminal 100 participates in call usually, information receiving and transmitting communicates with other type.Each reverse link signal that certain base station 270 receives is processed by particular B S270.The data obtained are forwarded to relevant BSC275.BSC provides call Resourse Distribute and comprises the mobile management function of coordination of the soft switching process between BS270.The data received also are routed to MSC280 by BSC275, and it is provided for the extra route service forming interface with PSTN290.Similarly, PSTN290 and MSC280 forms interface, and MSC and BSC275 forms interface, and BSC275 correspondingly control BS270 so that forward link signals is sent to mobile terminal 100.
Based on above-mentioned mobile terminal hardware configuration and communication system, each embodiment of the present invention is proposed.
As shown in Figure 3, first embodiment of the invention proposes a kind of loud speaker, comprising: operatic tunes housing 310 and sound film 320.
This operatic tunes housing 310 comprises: the first sound channel 311, second sound channel 312 and the 3rd sound channel 313, and these the second sound 312 passage two ends are communicated with the first sound channel 311 and the 3rd sound channel 313 respectively, forms the passage of " U " type structure;
Open-ended formation first sound mouth of this first sound channel 311;
Open-ended formation second sound mouth of the 3rd sound channel 313.
Further, in a preferred scheme,
The corner that this second sound channel 312 is connected with this first sound channel 313 is provided with sound reflecting barrier 314;
This sound reflecting barrier 314 is provided with reflecting surface 3141, and when sound wave propagates into this corner along the first sound channel 311, reflection will be carried out to this sound in this sound reflecting face 3141 makes this sound wave propagate along second channel.Wherein, sound direction of wave travel is as shown in middle arrow.
Further, in a preferred scheme,
The corner that this second sound channel 312 is connected with the 3rd sound channel 313 is also provided with another sound reflecting barrier 315;
The structure of this sound reflecting barrier 315 is identical with sound reflecting barrier 314, also reflecting surface 3151 is provided with, when sound wave propagates into this corner along the first sound channel 311, the reflecting surface 3151 of this sound reflecting barrier 315 will carry out reflection to this sound wave makes this sound wave propagate 313 along third channel.
Further, in a preferred scheme,
The angle a of the reflecting surface of this sound reflecting barrier and the inwall of the first sound channel 311, second sound channel 312 or the 3rd sound channel 313 is 45 °.
Concrete, angle a can finely tune according to Practical Project space, and the standard of fine setting is: from second sound mouth sound wave out, should be consistent with first sound mouth maintenance amplitude out, frequency, phase place.
Further, in a preferred scheme, this sound reflecting barrier 314,315 is made up of sound reflection material, and this sound reflection material is often referred to the material that acoustical reflection factor is greater than 90%.
Further, in a preferred scheme, this sound reflection material can adopt glass fibre, alloy material or silicon crystal etc.
Further, in a preferred scheme, the cross section of this operatic tunes housing is " U " type structure corresponding with the sound channel of this " U " type structure.
This first sound channel 311 coordinates with the sound film 320 of this loud speaker.
This sound film 320 is arranged in this first sound channel 311, after being positioned at the first sound mouth, the sound channel of " U " structure in this operatic tunes housing 310 is divided into ante-chamber and back cavity, wherein this first sound channel 311 forms ante-chamber from the part of this sound film 320 to the first sound mouth, and this first sound channel 311 forms back cavity from the part after this sound film 320 and the second sound channel 312 be connected with this first sound channel 311, the 3rd sound channel 313.
Be described to the loud speaker of the present embodiment and the operation principle of operatic tunes shell thereof below:
When the sound film 320 of loud speaker vibrates, a sound wave part for the sound of generation spreads out of from the first sound mouth and is equivalent to primary sound, and another part spreads out of from the second sound mouth and is equivalent to echo.
Concrete, from the auditory properties of people's ear, people's ear can distinguish that the condition of echo must be greater than 0.1 second with the primary sound time difference, that is, if echo to the time of intelligent's ear more late than primary sound more than 0.1 second, people's ear just can make a distinction echo and primary sound, on the contrary, if the time going back up to intelligent's ear is less than 0.1 second compared with primary sound, echo will mix with primary sound, and primary sound effect will be made to strengthen.
The aerial transmission speed of known sound wave is v=340 meter per second, can calculate the distance that echo sound wave propagates in the time of t=0.1 second to be by formula s=vt:
S=vt=340 meter per second * 0.1 second=34 meters
Because echo produces because sound is reflected by reverberation, if therefore speaker will hear echo, the minimum range 1=s/2=34 rice/2=17 rice between itself and reverberation.Therefore in atmosphere, the distance between teller and reverberation must be over more than 17m, and people can hear and echo and primary sound be distinguished.
In the present embodiment when the sound film 320 of loud speaker vibrates, the sound wave of the sound of a generation part to spread out of from the first sound mouth through ante-chamber and is equivalent to primary sound, and another part to spread out of from the second sound mouth through back cavity and is equivalent to echo.Because this first sound mouth distance sound film 310 is comparatively near, so first reach people's ear, the second sound mouth distance sound film is comparatively far away, rear to intelligent's ear.
According to above-mentioned result of calculation, only the sound film 320 of loud speaker with raw distance reflect barrier 314,315 more than 17 meters time, or when cavity length is more than 34 meters afterwards, people's ear can tell primary sound and echo, otherwise echo will mix with primary sound, primary sound effect will be made to strengthen.
In practical application, the thickness of mobile terminal be all toward more and more thinner future development, therefore in the terminal, the rear cavity length of loud speaker is shorter, therefore the sound wave of primary sound is also be far smaller than 0.1 second to the sound wave of time of intelligent's ear and echo to the gap of the time of intelligent's ear, so the interaction energy produced makes primary sound strengthen, make the output sound pressure level of the loud speaker of same power higher, frequency response curve is closer to monomer curve of output.
In addition, when the cross section of operatic tunes housing is " U " type structure corresponding with the sound channel of this " U " type structure, groove in the middle of operatic tunes housing also can play the guiding function of sound wave, the sound wave transmitted backward is transferred forward, plays the effect strengthening primary sound further.
The loud speaker of the present embodiment and operatic tunes housing thereof, the passage being communicated with " U " type structure forming title by first passage, second channel and third channel is successively provided with in operatic tunes housing, and the sound wave of loud speaker is arranged in the first sound channel of this operatic tunes housing and the passage being somebody's turn to do " U " type structure is divided into ante-chamber and back cavity, therefore sound film forms primary sound to the sound wave produced during after vibration by ante-chamber, and spread out of from the first sound mouth, sound film forms echo to the sound wave produced during after vibration by this back cavity, and spreads out of from the second sound mouth and strengthen primary sound.Therefore, it is possible to make the output sound pressure level of the loud speaker of same power higher, frequency response curve is closer to monomer curve of output.
It should be noted that, in this article, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or device and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or device.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the device comprising this key element and also there is other identical element.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that above-described embodiment method can add required general hardware platform by software and realize, hardware can certainly be passed through, but in a lot of situation, the former is better execution mode.Based on such understanding, technical scheme of the present invention can embody with the form of software product the part that prior art contributes in essence in other words, this computer software product is stored in a storage medium (as ROM/RAM, magnetic disc, CD), comprising some instructions in order to make a station terminal equipment (can be mobile phone, computer, server, air conditioner, or the network equipment etc.) perform method described in each embodiment of the present invention.
These are only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (9)
1. an operatic tunes housing for loud speaker, is characterized in that, described operatic tunes housing comprises:
First sound channel, the second sound channel and the 3rd sound channel, described second sound channel two ends are communicated with the first sound channel and the 3rd sound channel respectively, form the passage of " U " type structure;
Open-ended formation first sound mouth of described first sound channel;
Open-ended formation second sound mouth of the 3rd sound channel.
2. loud speaker operatic tunes housing as claimed in claim 1, is characterized in that,
The corner that described second sound channel is connected with described first sound channel is provided with sound reflecting barrier;
Described sound reflecting barrier is provided with reflecting surface, and when sound wave is along the first sound channels spread to described corner, reflection will be carried out to described sound in described sound reflecting face makes described sound wave propagate along second channel.
3. loud speaker operatic tunes housing as claimed in claim 1, it is characterized in that, the corner that described second sound channel is connected with described 3rd sound channel is provided with sound reflecting barrier;
Described sound reflecting barrier is provided with reflecting surface, and when sound wave is along the first sound channels spread to described corner, described reflecting surface will carry out reflection to described sound wave makes described sound wave propagate along third channel.
4. loud speaker operatic tunes housing as claimed in claim 2 or claim 3, it is characterized in that, the angle of the inwall of the reflecting surface of described sound reflecting barrier and the first sound channel, the second sound channel or the 3rd sound channel is 45 °.
5. loud speaker operatic tunes housing as claimed in claim 4, it is characterized in that, described sound reflecting barrier is made up of sound reflection material.
6. loud speaker operatic tunes housing as claimed in claim 5, is characterized in that, described sound reflection material comprise in following material any one: glass fibre, alloy material or silicon crystal.
7. loud speaker operatic tunes housing as claimed in claim 6, is characterized in that,
Described first sound channel is used for coordinating with the sound film of described loud speaker.
8. loud speaker operatic tunes housing as claimed in claim 7, it is characterized in that, the cross section of described operatic tunes housing is " U " type structure corresponding with the passage of described " U " type structure.
9. a loud speaker, comprise sound film, it is characterized in that, described loud speaker also comprises operatic tunes housing as described in any one of claim 1 to 8, described sound film is arranged in described first sound channel, the sound channel of " U " structure in described operatic tunes housing is divided into ante-chamber and back cavity, wherein said first sound channel forms ante-chamber from described sound film to the part of the first sound mouth, and described first sound channel forms back cavity from the part after described sound film and the second sound channel be connected with described first sound channel, the 3rd sound channel.
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| CN201510148466.0A CN104902404B (en) | 2015-03-31 | 2015-03-31 | A kind of speaker and operatic tunes housing thereof |
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| CN201510148466.0A CN104902404B (en) | 2015-03-31 | 2015-03-31 | A kind of speaker and operatic tunes housing thereof |
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| CN104902404B CN104902404B (en) | 2016-08-24 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017080505A1 (en) * | 2015-11-13 | 2017-05-18 | 公安部第三研究所 | Echo suppression testing method |
| CN111479208A (en) * | 2020-04-17 | 2020-07-31 | 北京百度网讯科技有限公司 | Sound cavity testing system, method, device and readable storage medium |
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| CN202818569U (en) * | 2012-09-12 | 2013-03-20 | 瑞声光电科技(常州)有限公司 | Low sound box |
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Also Published As
| Publication number | Publication date |
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| CN104902404B (en) | 2016-08-24 |
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Effective date of registration: 20190729 Address after: 518000 9th Floor, Block C, Dazu Innovation Building, 9018 North Ring Avenue, Nanshan High-tech Zone, Shenzhen City, Guangdong Province Co-patentee after: Nubian Technologies Ltd. Patentee after: Shenzhen ZTE Mobile Software Co., Ltd. Address before: 518000 Guangdong Province, Shenzhen high tech Zone of Nanshan District City, No. 9018 North Central Avenue's innovation building A, 6-8 layer, 10-11 layer, B layer, C District 6-10 District 6 floor Patentee before: Nubian Technologies Ltd. |